MIL-DTL-38999

It is a series of high-density miniature circular connectors that meet the strict requirements of military and aerospace applications.

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MIL-DTL-38999:

Purpose and Design

The MIL-DTL-38999 specification specifies rigorous requirements for connector design, fabrication, and performance. Intended for cable-to-panel I/O applications, it offers nine shell sizes and various contact arrangements to meet diverse operational needs. Its circular form factor supports male/female configurations, enabling reliable high-speed connections.

This connector family is divided into four series, each tailored for specific applications through unique coupling mechanisms, materials, and features.

Series Breakdown

The D38999 family is broadly categorized into four distinct series, each offering unique features and advantages:

MIL-DTL-38999 Series I

• Coupling Mechanism: Bayonet-type, quick-disconnect.

• Applications: Ideal for blind-mating or hard-to-reach areas requiring rapid connections, such as high-vibration and high-humidity environments. Features a scoop-proof design to protect contacts from damage.

• Materials: Offers finishes like electroless nickel, cadmium/olive drab, and anodized coating, with both conductive and non-conductive options available.

MIL-DTL-38999 Series II

• Coupling Mechanism: Low-profile bayonet coupling, quick-disconnect with captive design.

• Applications: Preferred for lightweight, compact designs (aviation, medical tech, communications). Non-scoop-proof design.

• Materials: Offers finishes: electroless nickel, cadmium/olive drab, anodized; versatile for diverse environments.

MIL-DTL-38999 Series III

• Coupling Mechanism: Threaded coupling, self-locking with rapid advance.

• Applications: Widely applied in high-vibration, high-temperature environments (military, aerospace). Scoop-proof design boosts contact durability.

• Materials: Conductive/non-conductive finishes. Options include stainless steel and composite shells for lightweight durability.

MIL-DTL-38999 Series III Composite

• Coupling Mechanism: Breech lock coupling, with rapid advance and self-locking.

• Applications: Series IV: Engineered for extreme vibration/shock resistance, widely used in missile systems and aerospace. Scoop-proof design guarantees robust performance.

• Materials: Various finishes (stainless steel, cadmium/olive drab) meet extreme operational requirements.

Application Areas

Military equipment

rugged, reliable, and versatile design, which can withstand harsh environments, extreme temperatures, and high vibration

Aerospace environments

D38999 connectors are suitable for aerospace environments due to their rugged construction, resistance to extreme temperatures and vibrations

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